METHOD OF OBTAINING COMPLEX FIBRE FROM HIGH-QUALITY POLYETYLENE Russian patent published in 2009 - IPC D01F6/04 D01D4/02 A61L17/10 A61L17/04 F41H5/04 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of obtaining complex fibres from high-quality polyethylene. Method includes obtaining polyethylene solution with superhigh mole weight in solvent; formation of fibres from solution through forming plate with at least 5 spinning holes, and through air clearance, drawing out obtained liquid elementary fibres with drawing out degree in liquid medium DR _liquid.; cooling of liquid elementary fibres with obtaining gel-like elementary fibres containing solvent; extraction of solvent and performing drawing out of elementary fibres in at least one stage before, during and/or after extraction of solvent with degree of drawing out DR_solid., equal to at least 4. Each spinning hole includes zone of narrowing characterised by specific size and further zone characterised by diametre D_n and length L_n with value L_n/D_n within the range from 0 to 25, with obtaining as a result degree of drawing out DR_liquid=DR_s.h×DR_a.c., equal to at least 150, where DR_s.h. - degree of drawing out in spinning holes, exceeding 1, and DR_a.c. - degree of drawing out in air clearance, equal to at least 1. From obtained complex fibres from high-quality polyethylene semi-finished products or products of consumptive use, including ropes and bulletproof composites, are produced.

EFFECT: elaboration of efficient technology of obtaining complex fibres from high-quality polyethylene.

30 cl, 4 dwg, 5 tbl, 29 ex